The Study On The Evaluation And Prediction And Optimization Decision Of Expressway Asphalt Pavement Performance

Since 1980s,the construction of expressways has developed rapidly,especially for expressway asphalt pavement . As a result of heavy traffic and the influence of climate and environment, the serviceability of expressway asphalt pavement has fallen year after year. The distresses such as cracking, rutting, sinkage appear on some section of expressways. It severely damages the public image of expressway agencies as well as greatly compromises the cost-effectiveness of expressway investment. With the rapid development of expressway, the maintenance of asphalt pavement becomes more and more important.Based on these problems, we study the expressway asphalt pavement deeply. This dissertation is completed on the basis of studying a lot of literatures at home and abroad in-depth, and includes the latest domestic and international research results. The main achievement of this dissertation are briefly mentioned as follows: Firstly, summarize systematically the present research conclusions of Pavement Management System domestic and international literatures, and point out the main problems of the realm and provide some solutions; Analyze the usual section of pavement units, its shortcomings are put forward, then the method of Sample in order cluster for pavements sectionalized with Units in Different Length is introduced and its application is explained;Secondly,in performance evaluation ,We account for the present situation of the pavement performance evaluation , expatiate on the connotation,advantages and shortages of every existing methods of the pavement performance evaluation; Analyze the feature of expressway asphalt pavement. And through analyzing the types causes and influence factors of disease of asphalt pavement, comprehensive estimate system about maintenance has been founded, and it's standard has been founded too;In performance prediction, based on the domestic and international forecast models of pavement performance, this dissertation analyzed the factors that affect the function of pavement. According to Chinese expressway engineering reality, we have proposed and established the grey-markov model and decay function that are used to predict the expressway asphalt pavement future performance; Finally, In performance optimization decision, maintenance decision-making model of expressway asphalt pavement is presented. Three optimization models are used to make expressway asphalt pavement maintenance need plan is founded. Three models have different restriction, which include maintenance standard being specified, maintenance level of road network being specified and maintenance cost being specified. Besides, the dissertation uses...